Merge pull request #52 from Quexer69/develop

Update _toolbar.php
To base model added enum field constants and labels with translation.
To CRUD added enum provider
implemented for crud Enum column filter and editable
BaseModel enum code normalised
Merge pull request #55 from DBRisinajumi/develop

Implemented ENUM
To features added enum and multi languages
Merge pull request #57 from DBRisinajumi/develop

In README.md to features added enum and multi languages
Fixed bugs for enum fields
Merge pull request #58 from DBRisinajumi/develop

Fixed bugs for enum fields
Bug fix: yiiboosters editable lib for hybrid theme controllers
Model search methods take existing optional criteria parameter
Using proper controller id for cancel button (hybrid theme)
Accepting optional controller id when generating editable columns (necessary for grids listing related models)
Update README.md
fix/update template/slim _form view -> registerPackage 'select2' and js selector